Add water, vegetable oil, cream of tartar and food colouring to the salt. Cook 5 min/60 degrees/Speed 4.
Add glitter, if using and then flour. Combine 1 min/degrees/Speed 3.
Use the spatula to help the mixture combine. repeat if necessary.
Turn the playdough out onto the benchtop and add a well for the lavender essential oil.
Fold the dough over and kneed until combined adding more flour if required.
Kneeding actually helps the mixture to become stronger and less sticky.
Video
Notes
STORAGE:Store the play dough in an airtight container or ziplock bag. The playdough should last for a month or so. If using DoTerra lavender or tea tree essential oil the playdough will have strong antibacterial qualities and will be safe to use for a very long time.